this proceeding, the NPA they relied upon in their state and federal civil lawsuits.5 "The doctrine of equitable estoppel is grounded in fairness." Bahamas Sales Assoc., LLC v. Byers, 701 F.3d 1335, 1342 (11th Cir. 2012). "The purpose of the doctrine is to prevent a plaintiff from, in effect, trying to have his ca